We design full service security solutions for residential, commercial, industrial and institutional markets. A Sentinel expert will provide you with the customized security solution, including certified installation, monitoring, and the customer support that’s right for you. Since 1978, Sentinel has been providing customized security solutions to clients in Montreal and the surrounding area. Our fully bilingual expert staff has over 200 years of combined experience in the security industry. Throughout its history, Sentinel has maintained its commitment to providing outstanding quality, service, and reliability.